When comparing PERGOLA vs Pixi.js, the Slant community recommends Pixi.js for most people. In the question“What are the best JavaScript drawing libraries?”Pixi.js is ranked 11th while PERGOLA is ranked 20th. The most important reason people chose Pixi.js is:

Pixi is a WebGL renderer, but can fall back to canvas if WebGL is not supported or turned off.